Professor Knudson, Arizona State University (image) Arizona State University Share Print E-Mail Caption This is professor Knudson in the archaeological chemistry laboratory. Credit Arizona State University Usage Restrictions May only be used with photo credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.